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dc.contributor.authorAuer, Stefan-
dc.contributor.authorZeiringer, Bernhard-
dc.contributor.authorFührer, Simon-
dc.contributor.authorTonolla, Diego-
dc.contributor.authorSchmutz, Stefan-
dc.date.accessioned2018-06-07T10:34:00Z-
dc.date.available2018-06-07T10:34:00Z-
dc.date.issued2017-
dc.identifier.issn0048-9697de_CH
dc.identifier.issn1879-1026de_CH
dc.identifier.urihttps://digitalcollection.zhaw.ch/handle/11475/6665-
dc.description.abstractHigh-head storage hydropower is deemed to be the ideal renewable energy source in Alpine regions to meet the increasing demand for daily peak electrical energy. However, this mode of operation – called hydropeaking – can imply severe hydrological and hydromorphological consequences for river ecosystems, affecting fish populations by e.g. drift and stranding of young life stages. Several fish-stranding experiments using physical models have been performed in the past, but until now very little is known about influences of time of day or gravel bank heterogeneity. We performed experiments during late summer 2013 with juvenile European grayling (Thymallus thymallus) (mean length: 53mm) in a nature-like experimental channel enabling hydropeaking simulations. In the first experiments (n=21) we observed relative drift and stranding rates for a single hydropeaking event focusing on the effect of time of day on a homogenous gravel bank. The second test series (n=15) focused on two dewatering potholes installed as potential traps. Additional experiments (n=6) were done with a reduced downramping rate to gain information about potential mitigation effects on stranding risk. During daytime and decreasing water level, we observed low drift rates of 15% and stranding rates below 5% in dewatering potholes and on homogenous gravel banks. However, in the presence of dewatering potholes, nighttime drift rates were about three times and stranding rates about ten times higher than on the homogenous gravel bank. A lowered downramping rate reduced drift to about a quarter and almost eliminated nocturnal stranding risk. These results might be used to effectively regulate water releases from high-head storage hydropower plants in a more suitable way for sensitive life stages of fish. Reducing the downramping rate or shifting peaks to daytime can reduce negative effects of hydropeaking in consideration of the morphological character of affected rivers.de_CH
dc.language.isoende_CH
dc.publisherElsevierde_CH
dc.relation.ispartofScience of the Total Environmentde_CH
dc.rightsLicence according to publishing contractde_CH
dc.subjectExperimentde_CH
dc.subjectFlow fluctuationde_CH
dc.subjectMitigationde_CH
dc.subjectPotholesde_CH
dc.subjectRamping ratede_CH
dc.subjectResponsede_CH
dc.subjectAnimalde_CH
dc.subjectAustriade_CH
dc.subjectEcosystemde_CH
dc.subjectHydrologyde_CH
dc.subjectPower Plantde_CH
dc.subjectSeasonde_CH
dc.subjectRenewable Energyde_CH
dc.subjectRiverde_CH
dc.subjectSalmonidaede_CH
dc.subjectWater Movementde_CH
dc.subject.ddc577: Ökologiede_CH
dc.titleEffects of river bank heterogeneity and time of day on drift and stranding of juvenile European grayling (Thymallus thymallus L.) caused by hydropeakingde_CH
dc.typeBeitrag in wissenschaftlicher Zeitschriftde_CH
dcterms.typeTextde_CH
zhaw.departementLife Sciences und Facility Managementde_CH
zhaw.organisationalunitInstitut für Umwelt und Natürliche Ressourcen (IUNR)de_CH
dc.identifier.doi10.1016/j.scitotenv.2016.10.029de_CH
dc.identifier.pmid27793351de_CH
zhaw.funding.euNode_CH
zhaw.originated.zhawYesde_CH
zhaw.pages.end1521de_CH
zhaw.pages.start1515de_CH
zhaw.publication.statuspublishedVersionde_CH
zhaw.volume575de_CH
zhaw.publication.reviewPeer review (Publikation)de_CH
zhaw.webfeedÖkohydrologiede_CH
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Auer, S., Zeiringer, B., Führer, S., Tonolla, D., & Schmutz, S. (2017). Effects of river bank heterogeneity and time of day on drift and stranding of juvenile European grayling (Thymallus thymallus L.) caused by hydropeaking. Science of the Total Environment, 575, 1515–1521. https://doi.org/10.1016/j.scitotenv.2016.10.029
Auer, S. et al. (2017) ‘Effects of river bank heterogeneity and time of day on drift and stranding of juvenile European grayling (Thymallus thymallus L.) caused by hydropeaking’, Science of the Total Environment, 575, pp. 1515–1521. Available at: https://doi.org/10.1016/j.scitotenv.2016.10.029.
S. Auer, B. Zeiringer, S. Führer, D. Tonolla, and S. Schmutz, “Effects of river bank heterogeneity and time of day on drift and stranding of juvenile European grayling (Thymallus thymallus L.) caused by hydropeaking,” Science of the Total Environment, vol. 575, pp. 1515–1521, 2017, doi: 10.1016/j.scitotenv.2016.10.029.
AUER, Stefan, Bernhard ZEIRINGER, Simon FÜHRER, Diego TONOLLA und Stefan SCHMUTZ, 2017. Effects of river bank heterogeneity and time of day on drift and stranding of juvenile European grayling (Thymallus thymallus L.) caused by hydropeaking. Science of the Total Environment. 2017. Bd. 575, S. 1515–1521. DOI 10.1016/j.scitotenv.2016.10.029
Auer, Stefan, Bernhard Zeiringer, Simon Führer, Diego Tonolla, and Stefan Schmutz. 2017. “Effects of River Bank Heterogeneity and Time of Day on Drift and Stranding of Juvenile European Grayling (Thymallus Thymallus L.) Caused by Hydropeaking.” Science of the Total Environment 575: 1515–21. https://doi.org/10.1016/j.scitotenv.2016.10.029.
Auer, Stefan, et al. “Effects of River Bank Heterogeneity and Time of Day on Drift and Stranding of Juvenile European Grayling (Thymallus Thymallus L.) Caused by Hydropeaking.” Science of the Total Environment, vol. 575, 2017, pp. 1515–21, https://doi.org/10.1016/j.scitotenv.2016.10.029.


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